Don't use a strip-type thermometer, which you hold on your baby's forehead, to check your baby's temperature. Strip thermometers only show the temperature of your baby's skin, not her body. It's also best not to use an old-fashioned, mercury-in-glass thermometer.
If your prawns are smaller, spread a piece of aluminum foil or banana leaf on the grill first, then place prawns on top. Or skewer the shrimp with satay sticks (if wood, soak in water first). Baste the prawns the first time you turn them with a little of the leftover sauce. Grill 3 to 5 minutes each side. Prawns are done when the flesh turns from translucent to pinkish-white (and the shells turn a very attractive bright pink).
When ready to cook the fish, brush the skin of the fish with oil or melted butter. Place the fillets, skin side down, on the grate. Cover the grill. Cook the fish until the skin is darkly browned and crackling crisp and the meat flakes easily when pressed with a finger, 6 to 12 minutes. If the skin starts to burn before the fish is cooked, pull the fillets onto a piece of aluminum foil.